PoS - Proceedings of Science
Volume 301 - 35th International Cosmic Ray Conference (ICRC2017) - Session Cosmic-Ray Indirect. CRI-instrumentation EAS
Coherent radio emission from the electron beam sudden appearance
K. de Vries*, P. Motloch, F. Partous, R. Gaior, T. Meures, A. Ishihara, K. Takao, K. Mase, S. Yoshida, S. Ueyama, M. Relich, M. Fukushima, D. Ikeda, J.N. Matthews, H. Sagawa, T. Shibata, B. Shin, K. Hanson, G. Thomson, A. O'Murchadha, I. Ohota and Y. Inome
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Pre-published on: August 16, 2017
Published on: August 03, 2018
We report on radio frequency measurements of the electron beam sudden appearance signal from the Telescope Array Electron Light Source (TA-ELS). The TA-ELS is constructed to calibrate the Telescope Array fluorescence telescope, and as such it can be used to mimic a cosmic-ray or neutrino induced particle cascade. This makes the TA-ELS the perfect facility to study new detection techniques such as the radio detection method. We report on the data obtained by four independent radio detection set-ups. Originally searching for either the direct Askaryan radio emission, or a radar echo from the induced plasma, all these experiments measured a very strong transient signal when the beam exits the accelerator. Due to the different scope of the individual experiments, we have detected the beam sudden appearance signal at different frequencies, ranging between 50 MHz and 12.5 GHz. The direct application in nature for this signal is found in cosmic-ray or neutrino induced particle cascades traversing through different media, such as air, ice, and rock. These measurements are compared to the theoretical predictions for this signal, where it follows that theory and experiment match very well over the full spectrum.
DOI: https://doi.org/10.22323/1.301.0391
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